The tumblers are made of food grade colored aluminum which preserves contact cool, helping the tumbler keep your drink cool and fresh. Not easy to fade, crack or peel. The funny tumblers are suitable for wine, whiskey, milk, water, cocktail, or other drinks to your heart's content. They are a good choice for leisure and application at home, office, road trips, camping and traveling, hiking, sporting activities, picnics. Your logo is welcomed to laser engraved or imprinting to show your brand.